Objective:To investigate the feasibility and clinical efficacy of percutaneous vertebroplasty (PVP) with measured saturated bone cement injection in the treatment of elderly patients with stage Ⅱ Kümmell's disease.Methods:A retrospective analysis was conducted to analyze the clinical data of the 41 elderly patients with stage Ⅱ Kümmell's disease who had been treated at Department of Spinal Orthopedics, Zhengzhou Orthopedic Hospital from June 2017 to June 2023 by PVP with bone cement injection into the intravertebral vacuum cleft. According to the amount of bone cement injected, the patients were divided into a saturated volume group (bone cement injection metered ≥ 150% of the cleft volume preoperatively measured) in which there were 21 cases, 4 males and 17 females, aged (78.4±5.2) years and a conventional volume group (bone cement injection metered was 100% to 120% of the cleft volume preoperatively measured) in which there were 20 cases, 6 males and 14 females, aged (79.5±7.4) years. The operative time, vacuum cleft volume measured, actual volume of bone cement injected, and percentage of bone cement injected were compared between the 2 groups. Visual analogue scale (VAS) for pain and Oswestry disability index (ODI) were compared between preoperation, postoperative 3 days, and the final follow-up in the 2 groups, as well as between the 2 groups. Cement leakage and other complications were documented.Results:The differences in the preoperative general data were not statistically significant between the 2 groups, indicating comparability ( P>0.05). All the 41 elderly patients successfully completed their surgery. Follow-up time was (18.1±3.3) months. The operative time [(39.7±7.5) min], actual volume of bone cement injected [(5.6±0.9) mL], and percentage of bone cement injected (1.8%±0.3%) in the saturated volume group were all significantly greater than those in the conventional volume group [(35.5±4.9) min, (4.4±1.0) mL, and 1.2%±0.1%] ( P<0.05). Postoperatively, the incisions healed completely in all patients, with no such complications as cement-related adverse reactions. Cement leakage occurred in 2 patients in the conventional volume group, leading to lumbar pain or discomfort after activity, which was relieved by cement reinforcement and nail-rod internal fixation. VAS pain scores and ODIs at 3 d postoperatively and at the final follow-up were significantly improved in all patients compared with preoperation ( P<0.05). At the final follow-up, both VAS pain score and ODI in the saturated volume group improved significantly greater than those in the conventional volume group ( P<0.05). None of the patients had complications like cement displacement at the final follow-up. Conclusion:PVP with measured saturated bone cement injection into the intravertebral vacuum clefts is a safe and effective treatment for stage Ⅱ Kümmell's disease in elderly patients, offering a new minimally invasive option.

Objective:To compare the efficacy of O-arm navigation versus C-arm guidance for anterior internal fixation in the management of Anderson-D′Alonzo type II odontoid fractures.Methods:A retrospective cohort study was conducted to analyze the clinical data of 58 patients with Anderson-D′Alonzo type II odontoid fractures admitted to Zhengzhou Orthopedic Hospital between January 2017 and September 2024, including 35 males and 23 females, aged 18-57 years [(39.3±9.0)years]. Anderson-D′Alonzo type II fractures were further classified as type IIA in 25 patients and type IIB in 33. Twenty-seven patients underwent O-arm assisted anterior internal fixation (O-arm navigation group), while 31 received C-arm guided anterior internal fixation (C-arm guidance group). The two groups were compared in terms of the operative duration, intraoperative blood loss, success rate for one-time guidewire placement, and intraoperative radiation exposure (anteroposterior and lateral views). At 3 days postoperatively, screw placement accuracy was evaluated via CT in both groups. Additionally, neck disability index (NDI) and visual analogue scale (VAS) scores were assessed preoperatively, at 1 week, 3 months postoperatively, and at the last follow-up. Bone union time and complication rate were also analyzed.Results:All the patients were followed up for 6-20 months [(13.1±3.4)months]. The O-arm navigation group exhibited significantly shorter operative duration [(91.1± 8.9)minutes] and less intraoperative blood loss [(38.9±8.2)ml], compared with (103.3±14.5)minutes and (47.3±9.1)ml in the C-arm guidance group ( P<0.01). The success rate for one-time guidewire placement was 100% (27/27) in the O-arm navigation group, significantly higher than 52% (16/31) in the C-arm guidance group ( P<0.01). Intraoperative radiation exposure for patients in the O-arm navigation group was lower in both anteroposterior view [(11 612.6±1 603.6)μSv] and lateral views [(29 738.2±6 602.5)μSv], compared with (40 638.0±9 431.9)μSv and (47 152.0±11 759.3)μSv in the C-arm guidance group ( P<0.01). CT scans at 3 days postoperatively revealed a 100% (27/27) screw placement accuracy in the O-arm navigation group, compared with 65% (20/31) in the C-arm guidance group ( P<0.01). Before operation, at 1 weeks and 3 months postoperatively, and at the last follow-up, NDI scores were (48.4±7.8)%, (21.0±3.1)%, (14.4±2.4)%, and (13.9±2.3)% in the O-arm navigation group, while they were (47.4±7.6)%, (20.9±3.2)%, (14.1±2.0)%, and (13.8±1.4)% in the C-arm guidance group ( P>0.05); VAS scores were 6.0(6.0, 7.0)points, 4.0(3.0, 4.0)points, 2.0(1.0, 2.0)points, and 2.0(1.0, 2.0)points in the O-arm navigation group, while they were 7.0(6.0, 7.0)points, 4.0(3.0, 5.0)points, 2.0(1.0, 3.0)points, and 2.0(2.0, 2.0)points in the C-arm guidance group ( P>0.05). The NDI and VAS scores in both groups were significantly improved at 1 weeks and 3 months postoperatively, and at the last follow-up compared to those preoperatively ( P<0.05), and were furtherly improved at 3 months postoperatively and at the last follow-up compared to those at 1 weeks postoperatively ( P<0.05), with no significant differences between those at 3 months postoperatively and at the last follow-up ( P>0.05). No significant difference was found in bone union time between the two groups ( P>0.05). The complication rate in the O-arm navigation group was 4% (1/27), lower than 29% (9/31) in the C-arm guidance group ( P<0.05). Conclusions:Compared with C-arm guidance, O-arm assisted anterior internal fixation for Anderson-D′Alonzo type II odontoid fractures can reduce operative duration and intraoperative blood loss, improve the success rate for one-time guidewire placement and screw accuracy, and decrease radiation exposure and complication rate.

Objective:To compare the efficacy of three-dimensional visualization-assisted intermuscular versus conventional intermuscular cervical expansive open-door laminoplasty (CEOL) in the treatment of cervical spinal cord injury without fracture or dislocation (CSCIWFD).Methods:A retrospective cohort study was conducted to analyze the clinical data of 58 patients with CSCIWFD admitted to Zhengzhou Orthopedic Hospital from October 2021 to January 2024, including 39 males and 19 females, aged 36-77 years [(52.9±8.9)years]. Among them, 26 patients were treated with three-dimensional visualization-assisted intermuscular CEOL (three-dimensional visualization group), while 32 patients were treated with conventional intermuscular CEOL (conventional intermuscular group). All patients were treated with CEOL in 4 segments (C 3-C 6), comprising 104 surgical segments in the three-dimensional visualization group and 128 in the conventional intermuscular group. The following outcomes were compared between the two groups, including the operative duration, intraoperative blood loss, accuracy rate of open-door and hinge placement at the surgical levels, visual analogue scale (VAS) of the neck and shoulder and Japanese Orthopedic Association (JOA) score preoperatively, at 1 week, 1 month, 3 months, 6 months postoperatively and at the last follow-up, American Spinal Injury Association (ASIA) impairment scale preoperatively and at the last follow-up, and postoperative complication rate. Results:All patients were followed up for 12-24 months [(17.5±3.1)months]. The operative duration and intraoperative blood loss were (117.0±12.3)minutes and (151.3±30.9)ml in the three-dimensional visualization group, which were shorter or less than (131.9±15.0)minutes and (184.7±42.9)ml in the conventional intermuscular group ( P<0.01). The accuracy rate of open-door and hinge placement at the surgical levels was 94.2% (98/104) in the three-dimensional visualization group, significantly higher than 83.6% (107/128) in the conventional intermuscular group ( P<0.05). The VAS scores of the neck and shoulder preoperatively, at 1 week, 1 month, 3 months, 6 months postoperatively, and at the last follow-up were 6.0(5.0, 7.0)points, 3.5(3.0, 4.0)points, 3.0(2.0, 3.0)points, 2.0(1.0, 3.0)points, 2.0(1.0, 2.3)points, and 2.0(1.0, 2.0)points in the three-dimensional visualization group, which were not statistically different from 5.0(4.3, 6.8)points, 4.0(3.0, 4.0)points, 3.0(2.0, 3.0)points, 2.0(1.3, 2.0)points, 2.0(1.0, 2.8)points, and 2.0(1.0, 2.0)points in the conventional intermuscular group ( P>0.05). The VAS scores of the neck and shoulder in the two groups were significantly decreased at 1 week, 1 month and 3 months postoperatively from the preoperative values ( P<0.05), while they were stabilized at 6 months postoperatively and at the last follow-up compared with those at 3 months postoperatively, with no significant difference among them ( P>0.05). The JOA scores were (8.1±2.8)points, (10.0±2.6)points, (10.5±2.6)points, (11.6±2.3)points, (12.7±2.3)points, and (13.7±2.4)points in the three-dimensional visualization group, which were not statistically different from (8.8±2.2)points, (10.3±2.1)points, (10.8±2.0)points, (12.0±2.0)points, (12.9±2.0)points, and (13.8±2.1)points in the conventional intermuscular group ( P>0.05). The JOA scores of the two groups showed continuous improvement at 1 week, 1 month, 3 months, 6 months postoperatively and at the last follow-up in comparison with the preoperatively values ( P<0.05). Although no significant difference was observed between the two groups in ASIA grade preoperatively and at the last follow-up ( P>0.05), the ASIA grade at the last follow-up was significantly improved compared with that before surgery in both groups ( P<0.05). The postoperative complication rate was 12% (3/26) in the three-dimensional visualization group, significantly lower than 38% (12/32) in the conventional intermuscular group ( P<0.05). Conclusion:Compared with the conventional intermuscular approach, the three-dimensional visualization-assisted intermuscular CEOL offers advantages in reducing surgical trauma, improving surgical precision, and lowering the postoperative complication rate in the treatment of CSCIWFD.

Objective:To compare the efficacy of O-arm navigation-assisted and conventional posterior cervical expansive open-door laminoplasty (CEOL) via the intermuscular approach in the treatment of cervical spinal cord injury without fracture-dislocation (CSCIWFD).Methods:A prospective cohort study was conducted to analyze the clinical data of 60 CSCIWFD patients who were admitted to Zhengzhou Orthopedic Hospital from May 2021 to May 2023, with compression at C3-C6. Patients were randomly divided into two groups: 30 patients underwent O-arm navigation-assisted intermuscular approach CEOL (navigation-assisted group) and 30 patients underwent conventional intermuscular approach CEOL (conventional surgery group). Surgical duration, intraoperative blood loss, postoperative drainage volume, and total surgical blood loss were compared between the two groups. At 2 weeks postoperatively, CT scan was performed to evaluate the accuracy of hinge or open-door position preparation of the surgical segments. Visual analogue scale (VAS) for neck and shoulder pain and Japanese Orthopedic Association (JOA) scores were compared between the two groups preoperatively, at 2 weeks, 6 months postoperatively, and at the last follow-up. Complication rates were also evaluated.Results:A total of 60 patients with CSCIWFD were included, comprising 35 males and 25 females, aged 35-77 years [(50.9±8.6)years]. All the patients were followed up for 12-24 months [(16.9±3.1)months]. The surgical duration and intraoperative blood loss were (121.6±17.9)minutes and (144.7±44.2)ml in the navigation-assisted group, shorter or less than (132.3±14.6)minutes and (178.7±48.7)ml in the conventional surgery group ( P<0.05). There were no statistically significant differences in postoperative drainage volume and total surgical blood loss between the two groups ( P>0.05). CT scan reviewed at 2 weeks postoperatively revealed that the accuracy rate of hinge and open-door position preparation of the surgical segments in the navigation-assisted group was 99.2% (119/120), significantly higher than 86.7% (104/120) in the conventional surgery group ( P<0.01). Before operation and at 2 weeks, 6 months postoperatively, and at the last follow-up, the VAS scores for neck and shoulder pain and JOA scores in the navigation-assisted group were 5.0(4.0, 7.0)points and (8.7±2.8)points, 3.0(2.0, 4.0)points and (10.2±2.5)points, 2.0(1.0, 2.0)points and (1 3.0±1.8)points, and 1.0(1.0, 2.0)points and (13.9±1.5)points respectively, while in the conventional surgery group, the VAS scores and JOA scores were 5.5(5.0, 6.3)points and (8.8±2.6)points, 4.0(3.0, 4.0)points and (10.4±2.5)points, 2.0(1.0, 3.0)points and (12.9±2.2)points, and 2.0(1.0, 2.0)points and (13.8±2.0)points ( P>0.05). Both groups showed improvement in neck and shoulder VAS scores and JOA scores at 2 weeks, 6 months postoperatively, and at the last follow-up, compared to preoperative scores ( P<0.05); further improvement was observed at 6 months postoperatively and at the last follow-up compared to that at 2 weeks postoperatively ( P<0.05). There were no significant differences between neck and shoulder VAS scores or JOA scores at 6 months postoperatively and at the last follow-up ( P>0.05). In the navigation-assisted group, 2 patients had axial neck-shoulder pain postoperatively, with a complication rate of 7% (2/30); while in the conventional surgery group, 7 patients had axial neck-shoulder pain and one patient developed cerebrospinal fluid leakage and low-pressure headache, with a complication rate of 27% (8/30) ( P<0.05). Conclusion:Compared to the conventional intermuscular approach, O-arm navigation-assisted intermuscular approach CEOL for CSCIWFD reduces surgical duration and intraoperative blood loss, improves the accuracy of hinge and open-door position preparation, and lowers complication rates.

Objective:To compare the efficacy of O-arm navigation-assisted and conventional posterior cervical expansive open-door laminoplasty (CEOL) via the intermuscular approach in the treatment of cervical spinal cord injury without fracture-dislocation (CSCIWFD).Methods:A prospective cohort study was conducted to analyze the clinical data of 60 CSCIWFD patients who were admitted to Zhengzhou Orthopedic Hospital from May 2021 to May 2023, with compression at C3-C6. Patients were randomly divided into two groups: 30 patients underwent O-arm navigation-assisted intermuscular approach CEOL (navigation-assisted group) and 30 patients underwent conventional intermuscular approach CEOL (conventional surgery group). Surgical duration, intraoperative blood loss, postoperative drainage volume, and total surgical blood loss were compared between the two groups. At 2 weeks postoperatively, CT scan was performed to evaluate the accuracy of hinge or open-door position preparation of the surgical segments. Visual analogue scale (VAS) for neck and shoulder pain and Japanese Orthopedic Association (JOA) scores were compared between the two groups preoperatively, at 2 weeks, 6 months postoperatively, and at the last follow-up. Complication rates were also evaluated.Results:A total of 60 patients with CSCIWFD were included, comprising 35 males and 25 females, aged 35-77 years [(50.9±8.6)years]. All the patients were followed up for 12-24 months [(16.9±3.1)months]. The surgical duration and intraoperative blood loss were (121.6±17.9)minutes and (144.7±44.2)ml in the navigation-assisted group, shorter or less than (132.3±14.6)minutes and (178.7±48.7)ml in the conventional surgery group ( P<0.05). There were no statistically significant differences in postoperative drainage volume and total surgical blood loss between the two groups ( P>0.05). CT scan reviewed at 2 weeks postoperatively revealed that the accuracy rate of hinge and open-door position preparation of the surgical segments in the navigation-assisted group was 99.2% (119/120), significantly higher than 86.7% (104/120) in the conventional surgery group ( P<0.01). Before operation and at 2 weeks, 6 months postoperatively, and at the last follow-up, the VAS scores for neck and shoulder pain and JOA scores in the navigation-assisted group were 5.0(4.0, 7.0)points and (8.7±2.8)points, 3.0(2.0, 4.0)points and (10.2±2.5)points, 2.0(1.0, 2.0)points and (1 3.0±1.8)points, and 1.0(1.0, 2.0)points and (13.9±1.5)points respectively, while in the conventional surgery group, the VAS scores and JOA scores were 5.5(5.0, 6.3)points and (8.8±2.6)points, 4.0(3.0, 4.0)points and (10.4±2.5)points, 2.0(1.0, 3.0)points and (12.9±2.2)points, and 2.0(1.0, 2.0)points and (13.8±2.0)points ( P>0.05). Both groups showed improvement in neck and shoulder VAS scores and JOA scores at 2 weeks, 6 months postoperatively, and at the last follow-up, compared to preoperative scores ( P<0.05); further improvement was observed at 6 months postoperatively and at the last follow-up compared to that at 2 weeks postoperatively ( P<0.05). There were no significant differences between neck and shoulder VAS scores or JOA scores at 6 months postoperatively and at the last follow-up ( P>0.05). In the navigation-assisted group, 2 patients had axial neck-shoulder pain postoperatively, with a complication rate of 7% (2/30); while in the conventional surgery group, 7 patients had axial neck-shoulder pain and one patient developed cerebrospinal fluid leakage and low-pressure headache, with a complication rate of 27% (8/30) ( P<0.05). Conclusion:Compared to the conventional intermuscular approach, O-arm navigation-assisted intermuscular approach CEOL for CSCIWFD reduces surgical duration and intraoperative blood loss, improves the accuracy of hinge and open-door position preparation, and lowers complication rates.

Objective:To compare the efficacy of O-arm navigation versus C-arm guidance for anterior internal fixation in the management of Anderson-D′Alonzo type II odontoid fractures.Methods:A retrospective cohort study was conducted to analyze the clinical data of 58 patients with Anderson-D′Alonzo type II odontoid fractures admitted to Zhengzhou Orthopedic Hospital between January 2017 and September 2024, including 35 males and 23 females, aged 18-57 years [(39.3±9.0)years]. Anderson-D′Alonzo type II fractures were further classified as type IIA in 25 patients and type IIB in 33. Twenty-seven patients underwent O-arm assisted anterior internal fixation (O-arm navigation group), while 31 received C-arm guided anterior internal fixation (C-arm guidance group). The two groups were compared in terms of the operative duration, intraoperative blood loss, success rate for one-time guidewire placement, and intraoperative radiation exposure (anteroposterior and lateral views). At 3 days postoperatively, screw placement accuracy was evaluated via CT in both groups. Additionally, neck disability index (NDI) and visual analogue scale (VAS) scores were assessed preoperatively, at 1 week, 3 months postoperatively, and at the last follow-up. Bone union time and complication rate were also analyzed.Results:All the patients were followed up for 6-20 months [(13.1±3.4)months]. The O-arm navigation group exhibited significantly shorter operative duration [(91.1± 8.9)minutes] and less intraoperative blood loss [(38.9±8.2)ml], compared with (103.3±14.5)minutes and (47.3±9.1)ml in the C-arm guidance group ( P<0.01). The success rate for one-time guidewire placement was 100% (27/27) in the O-arm navigation group, significantly higher than 52% (16/31) in the C-arm guidance group ( P<0.01). Intraoperative radiation exposure for patients in the O-arm navigation group was lower in both anteroposterior view [(11 612.6±1 603.6)μSv] and lateral views [(29 738.2±6 602.5)μSv], compared with (40 638.0±9 431.9)μSv and (47 152.0±11 759.3)μSv in the C-arm guidance group ( P<0.01). CT scans at 3 days postoperatively revealed a 100% (27/27) screw placement accuracy in the O-arm navigation group, compared with 65% (20/31) in the C-arm guidance group ( P<0.01). Before operation, at 1 weeks and 3 months postoperatively, and at the last follow-up, NDI scores were (48.4±7.8)%, (21.0±3.1)%, (14.4±2.4)%, and (13.9±2.3)% in the O-arm navigation group, while they were (47.4±7.6)%, (20.9±3.2)%, (14.1±2.0)%, and (13.8±1.4)% in the C-arm guidance group ( P>0.05); VAS scores were 6.0(6.0, 7.0)points, 4.0(3.0, 4.0)points, 2.0(1.0, 2.0)points, and 2.0(1.0, 2.0)points in the O-arm navigation group, while they were 7.0(6.0, 7.0)points, 4.0(3.0, 5.0)points, 2.0(1.0, 3.0)points, and 2.0(2.0, 2.0)points in the C-arm guidance group ( P>0.05). The NDI and VAS scores in both groups were significantly improved at 1 weeks and 3 months postoperatively, and at the last follow-up compared to those preoperatively ( P<0.05), and were furtherly improved at 3 months postoperatively and at the last follow-up compared to those at 1 weeks postoperatively ( P<0.05), with no significant differences between those at 3 months postoperatively and at the last follow-up ( P>0.05). No significant difference was found in bone union time between the two groups ( P>0.05). The complication rate in the O-arm navigation group was 4% (1/27), lower than 29% (9/31) in the C-arm guidance group ( P<0.05). Conclusions:Compared with C-arm guidance, O-arm assisted anterior internal fixation for Anderson-D′Alonzo type II odontoid fractures can reduce operative duration and intraoperative blood loss, improve the success rate for one-time guidewire placement and screw accuracy, and decrease radiation exposure and complication rate.

Objective:To compare the efficacy of three-dimensional visualization-assisted intermuscular versus conventional intermuscular cervical expansive open-door laminoplasty (CEOL) in the treatment of cervical spinal cord injury without fracture or dislocation (CSCIWFD).Methods:A retrospective cohort study was conducted to analyze the clinical data of 58 patients with CSCIWFD admitted to Zhengzhou Orthopedic Hospital from October 2021 to January 2024, including 39 males and 19 females, aged 36-77 years [(52.9±8.9)years]. Among them, 26 patients were treated with three-dimensional visualization-assisted intermuscular CEOL (three-dimensional visualization group), while 32 patients were treated with conventional intermuscular CEOL (conventional intermuscular group). All patients were treated with CEOL in 4 segments (C 3-C 6), comprising 104 surgical segments in the three-dimensional visualization group and 128 in the conventional intermuscular group. The following outcomes were compared between the two groups, including the operative duration, intraoperative blood loss, accuracy rate of open-door and hinge placement at the surgical levels, visual analogue scale (VAS) of the neck and shoulder and Japanese Orthopedic Association (JOA) score preoperatively, at 1 week, 1 month, 3 months, 6 months postoperatively and at the last follow-up, American Spinal Injury Association (ASIA) impairment scale preoperatively and at the last follow-up, and postoperative complication rate. Results:All patients were followed up for 12-24 months [(17.5±3.1)months]. The operative duration and intraoperative blood loss were (117.0±12.3)minutes and (151.3±30.9)ml in the three-dimensional visualization group, which were shorter or less than (131.9±15.0)minutes and (184.7±42.9)ml in the conventional intermuscular group ( P<0.01). The accuracy rate of open-door and hinge placement at the surgical levels was 94.2% (98/104) in the three-dimensional visualization group, significantly higher than 83.6% (107/128) in the conventional intermuscular group ( P<0.05). The VAS scores of the neck and shoulder preoperatively, at 1 week, 1 month, 3 months, 6 months postoperatively, and at the last follow-up were 6.0(5.0, 7.0)points, 3.5(3.0, 4.0)points, 3.0(2.0, 3.0)points, 2.0(1.0, 3.0)points, 2.0(1.0, 2.3)points, and 2.0(1.0, 2.0)points in the three-dimensional visualization group, which were not statistically different from 5.0(4.3, 6.8)points, 4.0(3.0, 4.0)points, 3.0(2.0, 3.0)points, 2.0(1.3, 2.0)points, 2.0(1.0, 2.8)points, and 2.0(1.0, 2.0)points in the conventional intermuscular group ( P>0.05). The VAS scores of the neck and shoulder in the two groups were significantly decreased at 1 week, 1 month and 3 months postoperatively from the preoperative values ( P<0.05), while they were stabilized at 6 months postoperatively and at the last follow-up compared with those at 3 months postoperatively, with no significant difference among them ( P>0.05). The JOA scores were (8.1±2.8)points, (10.0±2.6)points, (10.5±2.6)points, (11.6±2.3)points, (12.7±2.3)points, and (13.7±2.4)points in the three-dimensional visualization group, which were not statistically different from (8.8±2.2)points, (10.3±2.1)points, (10.8±2.0)points, (12.0±2.0)points, (12.9±2.0)points, and (13.8±2.1)points in the conventional intermuscular group ( P>0.05). The JOA scores of the two groups showed continuous improvement at 1 week, 1 month, 3 months, 6 months postoperatively and at the last follow-up in comparison with the preoperatively values ( P<0.05). Although no significant difference was observed between the two groups in ASIA grade preoperatively and at the last follow-up ( P>0.05), the ASIA grade at the last follow-up was significantly improved compared with that before surgery in both groups ( P<0.05). The postoperative complication rate was 12% (3/26) in the three-dimensional visualization group, significantly lower than 38% (12/32) in the conventional intermuscular group ( P<0.05). Conclusion:Compared with the conventional intermuscular approach, the three-dimensional visualization-assisted intermuscular CEOL offers advantages in reducing surgical trauma, improving surgical precision, and lowering the postoperative complication rate in the treatment of CSCIWFD.

Objective:To investigate the feasibility and clinical efficacy of percutaneous vertebroplasty (PVP) with measured saturated bone cement injection in the treatment of elderly patients with stage Ⅱ Kümmell's disease.Methods:A retrospective analysis was conducted to analyze the clinical data of the 41 elderly patients with stage Ⅱ Kümmell's disease who had been treated at Department of Spinal Orthopedics, Zhengzhou Orthopedic Hospital from June 2017 to June 2023 by PVP with bone cement injection into the intravertebral vacuum cleft. According to the amount of bone cement injected, the patients were divided into a saturated volume group (bone cement injection metered ≥ 150% of the cleft volume preoperatively measured) in which there were 21 cases, 4 males and 17 females, aged (78.4±5.2) years and a conventional volume group (bone cement injection metered was 100% to 120% of the cleft volume preoperatively measured) in which there were 20 cases, 6 males and 14 females, aged (79.5±7.4) years. The operative time, vacuum cleft volume measured, actual volume of bone cement injected, and percentage of bone cement injected were compared between the 2 groups. Visual analogue scale (VAS) for pain and Oswestry disability index (ODI) were compared between preoperation, postoperative 3 days, and the final follow-up in the 2 groups, as well as between the 2 groups. Cement leakage and other complications were documented.Results:The differences in the preoperative general data were not statistically significant between the 2 groups, indicating comparability ( P>0.05). All the 41 elderly patients successfully completed their surgery. Follow-up time was (18.1±3.3) months. The operative time [(39.7±7.5) min], actual volume of bone cement injected [(5.6±0.9) mL], and percentage of bone cement injected (1.8%±0.3%) in the saturated volume group were all significantly greater than those in the conventional volume group [(35.5±4.9) min, (4.4±1.0) mL, and 1.2%±0.1%] ( P<0.05). Postoperatively, the incisions healed completely in all patients, with no such complications as cement-related adverse reactions. Cement leakage occurred in 2 patients in the conventional volume group, leading to lumbar pain or discomfort after activity, which was relieved by cement reinforcement and nail-rod internal fixation. VAS pain scores and ODIs at 3 d postoperatively and at the final follow-up were significantly improved in all patients compared with preoperation ( P<0.05). At the final follow-up, both VAS pain score and ODI in the saturated volume group improved significantly greater than those in the conventional volume group ( P<0.05). None of the patients had complications like cement displacement at the final follow-up. Conclusion:PVP with measured saturated bone cement injection into the intravertebral vacuum clefts is a safe and effective treatment for stage Ⅱ Kümmell's disease in elderly patients, offering a new minimally invasive option.

Objective To evaluate the efficacy and safety of brexpiprazole in treating acute schizophrenia.Methods Patients with schizophrenia were randomly divided into treatment group and control group.The treatment group was given brexpiprozole 2-4 mg·d-1 orally and the control group was given aripiprazole 10-20 mg·d-1orally,both were treated for 6 weeks.Clinical efficacy of the two groups,the response rate at endpoint,the changes from baseline to endpoint of Positive and Negative Syndrome Scale(PANSS),Clinical Global Impression-Improvement(CGI-S),Personal and Social Performance scale(PSP),PANSS Positive syndrome subscale,PANSS negative syndrome subscale were compared.The incidence of treatment-related adverse events in two groups were compared.Results There were 184 patients in treatment group and 186 patients in control group.After treatment,the response rates of treatment group and control group were 79.50％(140 cases/184 cases)and 82.40％(150 cases/186 cases),the scores of CGI-I of treatment group and control group were(2.00±1.20)and(1.90±1.01),with no significant difference(all P＞0.05).From baseline to Week 6,the mean change of PANSS total score wese(-30.70±16.96)points in treatment group and(-32.20±17.00)points in control group,with no significant difference(P＞0.05).The changes of CGI-S scores in treatment group and control group were(-2.00±1.27)and(-1.90±1.22)points,PSP scores were(18.80±14.77)and(19.20±14.55)points,PANSS positive syndrome scores were(-10.30±5.93)and(-10.80±5.81)points,PANSS negative syndrome scores were(-6.80±5.98)and(-7.30±5.15)points,with no significant difference(P＞0.05).There was no significant difference in the incidence of treatment-related adverse events between the two group(69.00％vs.64.50％,P＞0.05).Conclusion The non-inferiority of Brexpiprazole to aripiprazole was established,with comparable efficacy and acceptability.

Objective:To evaluate the application of digital visualization in preoperative planning for surgical clearance of vertebral infection lesions following percutaneous vertebroplasty (PVP).Methods:A retrospective study was conducted to analyze the 13 patients with infectious spondylitis following PVP who had undergone one-stage posterior debridement and interbody bone grafting combined with instrumentation at Department of Spinal Surgery, Zhengzhou Orthopaedics Hospital from January 2016 to December 2022. They were 4 males and 9 females with an age of (71.4±6.5) years. Before surgery, the CT raw data of the patients were imported into software Mimics to reconstruct a three-dimensional model of the spine. After the distribution of bone cement in the model and its relationships with the vertebral plate, pedicle, articular process, and spinal cord were observed, a safe area for spinal canal surgery was designed. Intraoperative operations were carried out according to the preoperative planning. Surgical time, intraoperative blood loss, improvements in American Spinal Injury Association (ASIA) grading, and postoperative complications were recorded. The therapeutic efficacy was evaluated by comparisons of erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), visual analogue scale (VAS), and Oswestry disability index (ODI) between preoperation, 2 weeks and 3 months postoperation, and the last follow-up.Results:Surgery went on successfully in all the 13 patients according to the preoperative planning. The surgical time was (275.9±28.3) min and the intraoperative blood loss (865.4±183.0) mL. All patients were followed up for (24.7±9.4) months. The levels of ESR, CRP, VAS, and ODI at 2 weeks, 3 months and the last follow-up were significantly lower than those before surgery ( P<0.05). At the last follow-up, X-ray and CT examinations showed good positions of internal fixation and sufficient bone graft fusion. The ASIA grading recovered from preoperative D to E in 5 patients. No incision infection, sinus formation, worsening of neurological symptoms, loosening or rupture of internal fixation, or worsening of neurological dysfunction were found. Conclusion:With the assistance of 3D visualization, the spinal cord, bone cement, and debridement area can be visualized directly to reduce nerve injury complications so that a safe and effective preoperative planning can be made for surgical clearance of vertebral infection lesions following PVP.